Scm_ListRef       845 src/gauche.h   SCM_EXTERN ScmObj Scm_ListRef(ScmObj list, int i, ScmObj fallback);
Scm_ListRef       322 src/macro.c        ScmObj q = Scm_ListRef(ctx->pvars, count, SCM_UNBOUND);
Scm_ListRef      1835 src/stdlib.c   SCM_RESULT = Scm_ListRef(list, k, fallback);